Useful links

This index is aimed at those looking for figure-based, factual data on topics related to environment. I therefore mostly did not reference associative or activist sites. I also avoided sites containing no quantitative data, unless I am not aware of any other better reference on the topic.
If a topic is not listed under the expected letter, please do use the search feature of your web browser (typically shortcut is Ctrl-F) as you may find it listed elsewhere.
If you run into a dead link, please let me know! Of course you can send me your site suggestions.